Distributor member for stokers



April 5, 1938.

E. A. TURNER ET AL DISTRIBUTOR FOR STOKERS Filed NOV. 15, 1934 ATTORNEY Patented Apr. 5, 1938 UNITED STATES PATENT OFFICE DISTRIBUTOR MEMBER FOR STOKERS ware Application November 15, 1934, Serial No. 753,091

3 Claims.

Our invention relates to the distributor member for stokers of the type wherein a conduit communicates endwise with the firing opening of a boiler firebox. As the invention appertains to the distributor member and its associated parts, only so much of the remainder of the stoker mechanism is shown as is necessary to indicate the relation of the parts. The distributor member is exposed to the intense heat of the firebox. Because of this and due to cutting of the pressure fluid jet openings it must be replaced from time to time.

It is the main purpose of the invention to provide an improved and novel construction of the stoker conduit and the distributor member whereby the latter can be easily and readily removed from its position. Other objects of the invention reside in the specific form of the parts and in the particular fastening means employed to hold the distributor member in place.

On the drawing,

Figure 1 is a detail vertical section through the upright wall of a boiler firebox showing the device of the invention applied thereto in similar section;

' Figure 2 is an elevation from within the firebox looking toward the firing opening; and

Figure 3 is a plan view of the structure shown in Figures 1 and 2.

Referring to the drawing, there is shown at I a portion of an upstanding wall of a boiler firebox having a firing opening II therein to which fuel is advanced by the screw I2 housed within the inclined stoker conduit I3 which opens endwise into the firing opening. The rectangular mouth portion I4 of the conduit extends entirely across the lower portion of the firing opening slightly above the lower marginal edge thereof to provide a space I5 between the bottom wall I6 of the conduit and that portion of the firebox wall forming the lower extremity of the firing opening.

Bolts I'I engaging the flanges I8 at the sides of the mouth portion I4, secure the conduit to the firebox in endwise communication with the firing opening. Fuel advanced by the screw I2 passes along the bottom wall I6 onto the chambered distributor or jet member I9 positioned in the firing opening. This jet member constitutes an extension of the bottom wall or floor I6 of the conduit and is separable therefrom. It extends from one side of the firing opening to the other and includes an upstanding front wall 20 having vertically and laterally spaced forwardly directed jet openings 2| communicating with the cored chambers 22, 23 for discharging pressure fluid fuel propelling blasts over and above the distributing plate 24. Pressure fiuid is supplied to the chambers 22, 23 by supply lines 25 extending rearwardly from the jet r the outside surface of the firebox wall III. This insures a rigid construction of the conduit at its mouth portion where it is secured to the firebox and facilitates machining operations. The rear end of the jet member I9 abuts the front end of the floor I6 and the top of the jet member lies in the same inclined plane as the floor. As shown the jet member I9 is wholly within the confines of the firing opening although in some instances it may be desirable to position the front wall 20 at or-forward of the inside surface of the firebox wall I0.

An improved construction is provided for securing the jet member I9 in position. For this purpose laterally spaced arms 39, one at each side of the vertical medial plane of the firing opening II, extend rearwardly and downwardly from the jet member I9 through the space I5 and at their lower ends are arranged in overlapping relation with the outside of the firebox wall II]. The forked ends of the arms receive the studs 3I threaded in the firebox Wall, and the washers 32 and the nuts 33 on the studs above the arms firmly secure the arms to the firebox wall and, together with the overlapping relation of the arms and the firebox Wall, maintain the jet member I9 inthe position heretofore described.

The supply lines 25 are disposed between the arms 30 and both the supply lines and the arms are beneath the floor I6 where they are protected by the conduit.

By merely loosening the nuts 33, the jet member I9 can be removed and replaced through the firing opening II without in any way disturbing the setting of the conduit or without dumping the fire.

In operation, fuel advanced by the screw I2 spreads laterally the full width of the conduit mouth portion I4 forming a fuel stream advancing into the firing opening H for substantially the width thereof and over the jet member IS. The fuel falls from the top of the jet member downwardly into the zone of action of the pressure fluid blasts discharging from the jet openings 2! sweeping over the distributor plate, the ribs 34 of which aid in giving direction to the fuel.

Loss of fuel through the gaps 35 formed by the rounded edges of the firebox wall is avoided by the plates 36 contacting the jet member 19 and constituting extensions of the conduit side walls 28 placed closely adjacent the sides of the firebox wall forming the firing opening. These plates may be riveted to the conduit side walls and extend forwardly to the point of discharge of fuel from the conduit onto the propelling blasts and therefore protect the firebox wall from the abrasive action of the advancing fuel stream.

While the plates 36 are above the jet member they do not interfere with its removal. When the nuts 33 are loosened the jet member can be tilted downwardly to permit withdrawing the arms 30 through the space I5 and then pulled forwardly beyond the plates 36 and removed through that portion of the firing opening above the conduit 13, which portion, as is well known, is provided for hand firing and normally closed by the firedoor 37.

As applied to the construction described, for- Ward, forwardly and similar terms are used with reference to the direction of travel of the fuel.

We claim:

1. In combination, a firebox having an upstanding wall with a firing opening therein, a conduit exterior of the firebox communicating with the firing opening, the fuel supporting surface of the conduit extending upwardly and forwardly to the lower portion of the firing opening, the discharge end of said conduit being disposed above the lower marginal edge of the firing opening to provide a space therebetween, a chambered jet member in said firing opening spaced above the firebox wall defining the bottom of the firing opening and constituting an extension of the conduit, and means for rigidly securing said chambered jet member in spaced relation with respect to the firebox wall defining the bottom of said firing opening, said means including an arm extending downwardly from said jet member across said space and overlapping the outside surface of the upstanding firebox wall beneath said firing opening, the lower end of said arm being shaped like a fork with the prongs thereof directed downward, said last named means also including a fastener received by the forked end of said arm for rigidly securing the latter to said upstanding firebox wall.

2. In combination, a firebox having an upstanding wall with a firing opening therein, a conduit exterior of the firebox communicating with the firing opening, the discharge end of said conduit being disposed above the lower marginal edge of the firing opening to provide a space therebetween, a chambered jet member in said firing opening constituting an extension of the conduit, and means for securing said chambered jet member to the upstanding firebox wall comprising a plurality of laterally spaced arms extending downwardly from said jet member across said space and at their lower ends; each being shaped like a fork having downwardly directed prongs and arranged in overlapping relation with the outside surface of the firebox wall and fastening members received by said forked ends of the arms firmly securing said arms to said firebox wall.

3. In combination, a firebox having an upstanding wall with a firing opening therein, a conduit exterior of the firebox communicating with the firing opening, the discharge end of said conduit being disposed above the lower marginal edge of the firing opening to provide a space therebetween, a chambered jet member in.

said firing opening constituting an extension of the conduit, said jet member extending crosswise the full width of said firing opening, and means for securing said chambered jet member to the upstanding firebox wall comprising an arm at each side of the vertical medial plane of the firing opening extending downwardly from said jet member across said space and at its lower end being shaped like a fork having downwardly directed prongs and arranged in overlapping relation with the outside surface of the firebox wall and fastening members received by said forked ends of the arms firmly securing said arms to said firebox wall.

E. ARCHER TURNER.

CHARLES J. SURDY. 

